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首页> 外文期刊>Optical Materials >Effect of Mn and Cr doping on the up-conversion luminescence from NaYE4:Yb3+,Er3+
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Effect of Mn and Cr doping on the up-conversion luminescence from NaYE4:Yb3+,Er3+

机译：Mn和Cr掺杂对NaYE4：Yb3 +，Er3 +上转换发光的影响

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摘要

The up-conversion luminescence where the absorption of two or more low-energy photons results in emission of a higher-energy photon has been highly effective in certain applications such as bioanalytical assays. Currently one of the most efficient up-converting materials is the NaYF4:Yb3+,Er3+. However, some applications (e.g. solar cells) still require improvement of the up-conversion efficiency in order to have actual practical use. Therefore, it is important to enhance the performance of the materials. In this work, the effect of Mn and Cr doping on the up-conversion luminescence of NaYF4:Yb3+,Er3+ was studied. The materials were prepared using the co-precipitation method and the ratios of the doping ions were optimized for best up-conversion intensity. The as-prepared materials showed very similar sizes and morphologies. Cr co-doping was observed to increase the up-conversion luminescence whereas the addition of Mn resulted in quenching. Up-conversion luminescence was also measured with different excitation power densities and the results suggested that Cr co-doping enables the up-conversion in lower power densities than without Cr co-doping. Furthermore, the reasons for the changes in up-conversion luminescence intensity were discussed. (C) 2016 Elsevier B.V. All rights reserved.
机译：在某些应用（例如生物分析）中，两个或多个低能光子的吸收导致高能光子发射的上转换发光非常有效。目前，最有效的上转换材料之一是NaYF4：Yb3 +，Er3 +。但是，某些应用（例如太阳能电池）仍然需要提高上转换效率，以具有实际的实际用途。因此，重要的是增强材料的性能。在这项工作中，研究了Mn和Cr掺杂对NaYF4：Yb3 +，Er3 +的上转换发光的影响。使用共沉淀法制备材料，并优化掺杂离子的比例以获得最佳的上转换强度。所制备的材料显示出非常相似的尺寸和形态。观察到Cr共掺杂增加了上转换发光，而Mn的添加导致淬灭。还用不同的激发功率密度测量了上转换发光，结果表明，与不使用共掺杂铬相比，铬共掺杂可以在较低的功率密度下实现上转换。此外，讨论了上转换发光强度变化的原因。 （C）2016 Elsevier B.V.保留所有权利。

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